Winning the seat of Bowen in 1875, Amhurst held the seat for two years before resigning in 1877. The next year he contested and won Mackay, holding it till his death in 1881.
Death
Before his death, Amhurst had been in poorhealth. Hoping a change would help him recuperate, he sailed on the SS Bokhara bound for England, but diedat sea on 3 January 1881.